Pin Definition:_x000D_ Power supply pin:_x000D_ VIN - Power input pin. Voltage input range 3-5V;_x000D_ 2v8 - Output port, 2.8V output voltage generated by the on-board voltage regulator processing the input voltage of VIN;_x000D_ GND - Power supply ground;_x000D_ _x000D_ I2C communication pin:_x000D_ SCL - I2C clock pin, connected to the master SCL;_x000D_ SDA - I2C data pin, connected to the master SDA;_x000D_ _x000D_ Control pin:_x000D_ GPIO - Pin that the sensor uses to indicate the data ready. Note that the pin output is 0-2.8V high and low level. This pin may not be applied to boards such as for Arduino (These boards are 3.3 or 5V high level), need to add level conversion if applied._x000D_ SHDN - Shutdown pin of the sensor. By default it is pulled high. There is a level conversion diode so you can use 3-5V logic on this pin. When the pin is pulled low, the sensor enters shutdown mode.